drivers/scsi/fnic/fnic_fcs.c

   1 /*
   2  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  */
  18 #include <linux/errno.h>
  19 #include <linux/pci.h>
  20 #include <linux/slab.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/if_ether.h>
  25 #include <linux/if_vlan.h>
  26 #include <linux/workqueue.h>
  27 #include <scsi/fc/fc_fip.h>
  28 #include <scsi/fc/fc_els.h>
  29 #include <scsi/fc/fc_fcoe.h>
  30 #include <scsi/fc_frame.h>
  31 #include <scsi/libfc.h>
  32 #include "fnic_io.h"
  33 #include "fnic.h"
  34 #include "fnic_fip.h"
  35 #include "cq_enet_desc.h"
  36 #include "cq_exch_desc.h"
  37
  38 static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
  39 struct workqueue_struct *fnic_fip_queue;
  40 struct workqueue_struct *fnic_event_queue;
  41
  42 static void fnic_set_eth_mode(struct fnic *);
  43 static void fnic_fcoe_send_vlan_req(struct fnic *fnic);
  44 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic);
  45 static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *);
  46 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag);
  47 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb);
  48
  49 void fnic_handle_link(struct work_struct *work)
  50 {
  51         struct fnic *fnic = container_of(work, struct fnic, link_work);
  52         unsigned long flags;
  53         int old_link_status;
  54         u32 old_link_down_cnt;
  55
  56         spin_lock_irqsave(&fnic->fnic_lock, flags);
  57
  58         if (fnic->stop_rx_link_events) {
  59                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
  60                 return;
  61         }
  62
  63         old_link_down_cnt = fnic->link_down_cnt;
  64         old_link_status = fnic->link_status;
  65         fnic->link_status = vnic_dev_link_status(fnic->vdev);
  66         fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev);
  67
  68         if (old_link_status == fnic->link_status) {
  69                 if (!fnic->link_status) {
  70                         /* DOWN -> DOWN */
  71                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
  72                         fnic_fc_trace_set_data(fnic->lport->host->host_no,
  73                                 FNIC_FC_LE, "Link Status: DOWN->DOWN",
  74                                 strlen("Link Status: DOWN->DOWN"));
  75                 } else {
  76                         if (old_link_down_cnt != fnic->link_down_cnt) {
  77                                 /* UP -> DOWN -> UP */
  78                                 fnic->lport->host_stats.link_failure_count++;
  79                                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
  80                                 fnic_fc_trace_set_data(
  81                                         fnic->lport->host->host_no,
  82                                         FNIC_FC_LE,
  83                                         "Link Status:UP_DOWN_UP",
  84                                         strlen("Link_Status:UP_DOWN_UP")
  85                                         );
  86                                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
  87                                              "link down\n");
  88                                 fcoe_ctlr_link_down(&fnic->ctlr);
  89                                 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
  90                                         /* start FCoE VLAN discovery */
  91                                         fnic_fc_trace_set_data(
  92                                                 fnic->lport->host->host_no,
  93                                                 FNIC_FC_LE,
  94                                                 "Link Status: UP_DOWN_UP_VLAN",
  95                                                 strlen(
  96                                                 "Link Status: UP_DOWN_UP_VLAN")
  97                                                 );
  98                                         fnic_fcoe_send_vlan_req(fnic);
  99                                         return;
 100                                 }
 101                                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 102                                              "link up\n");
 103                                 fcoe_ctlr_link_up(&fnic->ctlr);
 104                         } else {
 105                                 /* UP -> UP */
 106                                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 107                                 fnic_fc_trace_set_data(
 108                                         fnic->lport->host->host_no, FNIC_FC_LE,
 109                                         "Link Status: UP_UP",
 110                                         strlen("Link Status: UP_UP"));
 111                         }
 112                 }
 113         } else if (fnic->link_status) {
 114                 /* DOWN -> UP */
 115                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 116                 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
 117                         /* start FCoE VLAN discovery */
 118                                 fnic_fc_trace_set_data(
 119                                 fnic->lport->host->host_no,
 120                                 FNIC_FC_LE, "Link Status: DOWN_UP_VLAN",
 121                                 strlen("Link Status: DOWN_UP_VLAN"));
 122                         fnic_fcoe_send_vlan_req(fnic);
 123                         return;
 124                 }
 125                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
 126                 fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_LE,
 127                         "Link Status: DOWN_UP", strlen("Link Status: DOWN_UP"));
 128                 fcoe_ctlr_link_up(&fnic->ctlr);
 129         } else {
 130                 /* UP -> DOWN */
 131                 fnic->lport->host_stats.link_failure_count++;
 132                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 133                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n");
 134                 fnic_fc_trace_set_data(
 135                         fnic->lport->host->host_no, FNIC_FC_LE,
 136                         "Link Status: UP_DOWN",
 137                         strlen("Link Status: UP_DOWN"));
 138                 fcoe_ctlr_link_down(&fnic->ctlr);
 139         }
 140
 141 }
 142
 143 /*
 144  * This function passes incoming fabric frames to libFC
 145  */
 146 void fnic_handle_frame(struct work_struct *work)
 147 {
 148         struct fnic *fnic = container_of(work, struct fnic, frame_work);
 149         struct fc_lport *lp = fnic->lport;
 150         unsigned long flags;
 151         struct sk_buff *skb;
 152         struct fc_frame *fp;
 153
 154         while ((skb = skb_dequeue(&fnic->frame_queue))) {
 155
 156                 spin_lock_irqsave(&fnic->fnic_lock, flags);
 157                 if (fnic->stop_rx_link_events) {
 158                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 159                         dev_kfree_skb(skb);
 160                         return;
 161                 }
 162                 fp = (struct fc_frame *)skb;
 163
 164                 /*
 165                  * If we're in a transitional state, just re-queue and return.
 166                  * The queue will be serviced when we get to a stable state.
 167                  */
 168                 if (fnic->state != FNIC_IN_FC_MODE &&
 169                     fnic->state != FNIC_IN_ETH_MODE) {
 170                         skb_queue_head(&fnic->frame_queue, skb);
 171                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 172                         return;
 173                 }
 174                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 175
 176                 fc_exch_recv(lp, fp);
 177         }
 178 }
 179
 180 void fnic_fcoe_evlist_free(struct fnic *fnic)
 181 {
 182         struct fnic_event *fevt = NULL;
 183         struct fnic_event *next = NULL;
 184         unsigned long flags;
 185
 186         spin_lock_irqsave(&fnic->fnic_lock, flags);
 187         if (list_empty(&fnic->evlist)) {
 188                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 189                 return;
 190         }
 191
 192         list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
 193                 list_del(&fevt->list);
 194                 kfree(fevt);
 195         }
 196         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 197 }
 198
 199 void fnic_handle_event(struct work_struct *work)
 200 {
 201         struct fnic *fnic = container_of(work, struct fnic, event_work);
 202         struct fnic_event *fevt = NULL;
 203         struct fnic_event *next = NULL;
 204         unsigned long flags;
 205
 206         spin_lock_irqsave(&fnic->fnic_lock, flags);
 207         if (list_empty(&fnic->evlist)) {
 208                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 209                 return;
 210         }
 211
 212         list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
 213                 if (fnic->stop_rx_link_events) {
 214                         list_del(&fevt->list);
 215                         kfree(fevt);
 216                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 217                         return;
 218                 }
 219                 /*
 220                  * If we're in a transitional state, just re-queue and return.
 221                  * The queue will be serviced when we get to a stable state.
 222                  */
 223                 if (fnic->state != FNIC_IN_FC_MODE &&
 224                     fnic->state != FNIC_IN_ETH_MODE) {
 225                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 226                         return;
 227                 }
 228
 229                 list_del(&fevt->list);
 230                 switch (fevt->event) {
 231                 case FNIC_EVT_START_VLAN_DISC:
 232                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 233                         fnic_fcoe_send_vlan_req(fnic);
 234                         spin_lock_irqsave(&fnic->fnic_lock, flags);
 235                         break;
 236                 case FNIC_EVT_START_FCF_DISC:
 237                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 238                                   "Start FCF Discovery\n");
 239                         fnic_fcoe_start_fcf_disc(fnic);
 240                         break;
 241                 default:
 242                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 243                                   "Unknown event 0x%x\n", fevt->event);
 244                         break;
 245                 }
 246                 kfree(fevt);
 247         }
 248         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 249 }
 250
 251 /**
 252  * Check if the Received FIP FLOGI frame is rejected
 253  * @fip: The FCoE controller that received the frame
 254  * @skb: The received FIP frame
 255  *
 256  * Returns non-zero if the frame is rejected with unsupported cmd with
 257  * insufficient resource els explanation.
 258  */
 259 static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip,
 260                                          struct sk_buff *skb)
 261 {
 262         struct fc_lport *lport = fip->lp;
 263         struct fip_header *fiph;
 264         struct fc_frame_header *fh = NULL;
 265         struct fip_desc *desc;
 266         struct fip_encaps *els;
 267         enum fip_desc_type els_dtype = 0;
 268         u16 op;
 269         u8 els_op;
 270         u8 sub;
 271
 272         size_t els_len = 0;
 273         size_t rlen;
 274         size_t dlen = 0;
 275
 276         if (skb_linearize(skb))
 277                 return 0;
 278
 279         if (skb->len < sizeof(*fiph))
 280                 return 0;
 281
 282         fiph = (struct fip_header *)skb->data;
 283         op = ntohs(fiph->fip_op);
 284         sub = fiph->fip_subcode;
 285
 286         if (op != FIP_OP_LS)
 287                 return 0;
 288
 289         if (sub != FIP_SC_REP)
 290                 return 0;
 291
 292         rlen = ntohs(fiph->fip_dl_len) * 4;
 293         if (rlen + sizeof(*fiph) > skb->len)
 294                 return 0;
 295
 296         desc = (struct fip_desc *)(fiph + 1);
 297         dlen = desc->fip_dlen * FIP_BPW;
 298
 299         if (desc->fip_dtype == FIP_DT_FLOGI) {
 300
 301                 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
 302                         return 0;
 303
 304                 els_len = dlen - sizeof(*els);
 305                 els = (struct fip_encaps *)desc;
 306                 fh = (struct fc_frame_header *)(els + 1);
 307                 els_dtype = desc->fip_dtype;
 308
 309                 if (!fh)
 310                         return 0;
 311
 312                 /*
 313                  * ELS command code, reason and explanation should be = Reject,
 314                  * unsupported command and insufficient resource
 315                  */
 316                 els_op = *(u8 *)(fh + 1);
 317                 if (els_op == ELS_LS_RJT) {
 318                         shost_printk(KERN_INFO, lport->host,
 319                                   "Flogi Request Rejected by Switch\n");
 320                         return 1;
 321                 }
 322                 shost_printk(KERN_INFO, lport->host,
 323                                 "Flogi Request Accepted by Switch\n");
 324         }
 325         return 0;
 326 }
 327
 328 static void fnic_fcoe_send_vlan_req(struct fnic *fnic)
 329 {
 330         struct fcoe_ctlr *fip = &fnic->ctlr;
 331         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 332         struct sk_buff *skb;
 333         char *eth_fr;
 334         int fr_len;
 335         struct fip_vlan *vlan;
 336         u64 vlan_tov;
 337
 338         fnic_fcoe_reset_vlans(fnic);
 339         fnic->set_vlan(fnic, 0);
 340         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 341                   "Sending VLAN request...\n");
 342         skb = dev_alloc_skb(sizeof(struct fip_vlan));
 343         if (!skb)
 344                 return;
 345
 346         fr_len = sizeof(*vlan);
 347         eth_fr = (char *)skb->data;
 348         vlan = (struct fip_vlan *)eth_fr;
 349
 350         memset(vlan, 0, sizeof(*vlan));
 351         memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
 352         memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN);
 353         vlan->eth.h_proto = htons(ETH_P_FIP);
 354
 355         vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
 356         vlan->fip.fip_op = htons(FIP_OP_VLAN);
 357         vlan->fip.fip_subcode = FIP_SC_VL_REQ;
 358         vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW);
 359
 360         vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
 361         vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW;
 362         memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
 363
 364         vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
 365         vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW;
 366         put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn);
 367         atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs);
 368
 369         skb_put(skb, sizeof(*vlan));
 370         skb->protocol = htons(ETH_P_FIP);
 371         skb_reset_mac_header(skb);
 372         skb_reset_network_header(skb);
 373         fip->send(fip, skb);
 374
 375         /* set a timer so that we can retry if there no response */
 376         vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV);
 377         mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov));
 378 }
 379
 380 static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb)
 381 {
 382         struct fcoe_ctlr *fip = &fnic->ctlr;
 383         struct fip_header *fiph;
 384         struct fip_desc *desc;
 385         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 386         u16 vid;
 387         size_t rlen;
 388         size_t dlen;
 389         struct fcoe_vlan *vlan;
 390         u64 sol_time;
 391         unsigned long flags;
 392
 393         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 394                   "Received VLAN response...\n");
 395
 396         fiph = (struct fip_header *) skb->data;
 397
 398         FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 399                   "Received VLAN response... OP 0x%x SUB_OP 0x%x\n",
 400                   ntohs(fiph->fip_op), fiph->fip_subcode);
 401
 402         rlen = ntohs(fiph->fip_dl_len) * 4;
 403         fnic_fcoe_reset_vlans(fnic);
 404         spin_lock_irqsave(&fnic->vlans_lock, flags);
 405         desc = (struct fip_desc *)(fiph + 1);
 406         while (rlen > 0) {
 407                 dlen = desc->fip_dlen * FIP_BPW;
 408                 switch (desc->fip_dtype) {
 409                 case FIP_DT_VLAN:
 410                         vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan);
 411                         shost_printk(KERN_INFO, fnic->lport->host,
 412                                   "process_vlan_resp: FIP VLAN %d\n", vid);
 413                         vlan = kmalloc(sizeof(*vlan),
 414                                                         GFP_ATOMIC);
 415                         if (!vlan) {
 416                                 /* retry from timer */
 417                                 spin_unlock_irqrestore(&fnic->vlans_lock,
 418                                                         flags);
 419                                 goto out;
 420                         }
 421                         memset(vlan, 0, sizeof(struct fcoe_vlan));
 422                         vlan->vid = vid & 0x0fff;
 423                         vlan->state = FIP_VLAN_AVAIL;
 424                         list_add_tail(&vlan->list, &fnic->vlans);
 425                         break;
 426                 }
 427                 desc = (struct fip_desc *)((char *)desc + dlen);
 428                 rlen -= dlen;
 429         }
 430
 431         /* any VLAN descriptors present ? */
 432         if (list_empty(&fnic->vlans)) {
 433                 /* retry from timer */
 434                 atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID);
 435                 FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
 436                           "No VLAN descriptors in FIP VLAN response\n");
 437                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 438                 goto out;
 439         }
 440
 441         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 442         fnic->set_vlan(fnic, vlan->vid);
 443         vlan->state = FIP_VLAN_SENT; /* sent now */
 444         vlan->sol_count++;
 445         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 446
 447         /* start the solicitation */
 448         fcoe_ctlr_link_up(fip);
 449
 450         sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 451         mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
 452 out:
 453         return;
 454 }
 455
 456 static void fnic_fcoe_start_fcf_disc(struct fnic *fnic)
 457 {
 458         unsigned long flags;
 459         struct fcoe_vlan *vlan;
 460         u64 sol_time;
 461
 462         spin_lock_irqsave(&fnic->vlans_lock, flags);
 463         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 464         fnic->set_vlan(fnic, vlan->vid);
 465         vlan->state = FIP_VLAN_SENT; /* sent now */
 466         vlan->sol_count = 1;
 467         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 468
 469         /* start the solicitation */
 470         fcoe_ctlr_link_up(&fnic->ctlr);
 471
 472         sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
 473         mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
 474 }
 475
 476 static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag)
 477 {
 478         unsigned long flags;
 479         struct fcoe_vlan *fvlan;
 480
 481         spin_lock_irqsave(&fnic->vlans_lock, flags);
 482         if (list_empty(&fnic->vlans)) {
 483                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 484                 return -EINVAL;
 485         }
 486
 487         fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
 488         if (fvlan->state == FIP_VLAN_USED) {
 489                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 490                 return 0;
 491         }
 492
 493         if (fvlan->state == FIP_VLAN_SENT) {
 494                 fvlan->state = FIP_VLAN_USED;
 495                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 496                 return 0;
 497         }
 498         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 499         return -EINVAL;
 500 }
 501
 502 static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev)
 503 {
 504         struct fnic_event *fevt;
 505         unsigned long flags;
 506
 507         fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC);
 508         if (!fevt)
 509                 return;
 510
 511         fevt->fnic = fnic;
 512         fevt->event = ev;
 513
 514         spin_lock_irqsave(&fnic->fnic_lock, flags);
 515         list_add_tail(&fevt->list, &fnic->evlist);
 516         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 517
 518         schedule_work(&fnic->event_work);
 519 }
 520
 521 static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb)
 522 {
 523         struct fip_header *fiph;
 524         int ret = 1;
 525         u16 op;
 526         u8 sub;
 527
 528         if (!skb || !(skb->data))
 529                 return -1;
 530
 531         if (skb_linearize(skb))
 532                 goto drop;
 533
 534         fiph = (struct fip_header *)skb->data;
 535         op = ntohs(fiph->fip_op);
 536         sub = fiph->fip_subcode;
 537
 538         if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
 539                 goto drop;
 540
 541         if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
 542                 goto drop;
 543
 544         if (op == FIP_OP_DISC && sub == FIP_SC_ADV) {
 545                 if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags)))
 546                         goto drop;
 547                 /* pass it on to fcoe */
 548                 ret = 1;
 549         } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_REP) {
 550                 /* set the vlan as used */
 551                 fnic_fcoe_process_vlan_resp(fnic, skb);
 552                 ret = 0;
 553         } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
 554                 /* received CVL request, restart vlan disc */
 555                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
 556                 /* pass it on to fcoe */
 557                 ret = 1;
 558         }
 559 drop:
 560         return ret;
 561 }
 562
 563 void fnic_handle_fip_frame(struct work_struct *work)
 564 {
 565         struct fnic *fnic = container_of(work, struct fnic, fip_frame_work);
 566         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 567         unsigned long flags;
 568         struct sk_buff *skb;
 569         struct ethhdr *eh;
 570
 571         while ((skb = skb_dequeue(&fnic->fip_frame_queue))) {
 572                 spin_lock_irqsave(&fnic->fnic_lock, flags);
 573                 if (fnic->stop_rx_link_events) {
 574                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 575                         dev_kfree_skb(skb);
 576                         return;
 577                 }
 578                 /*
 579                  * If we're in a transitional state, just re-queue and return.
 580                  * The queue will be serviced when we get to a stable state.
 581                  */
 582                 if (fnic->state != FNIC_IN_FC_MODE &&
 583                     fnic->state != FNIC_IN_ETH_MODE) {
 584                         skb_queue_head(&fnic->fip_frame_queue, skb);
 585                         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 586                         return;
 587                 }
 588                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 589                 eh = (struct ethhdr *)skb->data;
 590                 if (eh->h_proto == htons(ETH_P_FIP)) {
 591                         skb_pull(skb, sizeof(*eh));
 592                         if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) {
 593                                 dev_kfree_skb(skb);
 594                                 continue;
 595                         }
 596                         /*
 597                          * If there's FLOGI rejects - clear all
 598                          * fcf's & restart from scratch
 599                          */
 600                         if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) {
 601                                 atomic64_inc(
 602                                         &fnic_stats->vlan_stats.flogi_rejects);
 603                                 shost_printk(KERN_INFO, fnic->lport->host,
 604                                           "Trigger a Link down - VLAN Disc\n");
 605                                 fcoe_ctlr_link_down(&fnic->ctlr);
 606                                 /* start FCoE VLAN discovery */
 607                                 fnic_fcoe_send_vlan_req(fnic);
 608                                 dev_kfree_skb(skb);
 609                                 continue;
 610                         }
 611                         fcoe_ctlr_recv(&fnic->ctlr, skb);
 612                         continue;
 613                 }
 614         }
 615 }
 616
 617 /**
 618  * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame.
 619  * @fnic:       fnic instance.
 620  * @skb:        Ethernet Frame.
 621  */
 622 static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
 623 {
 624         struct fc_frame *fp;
 625         struct ethhdr *eh;
 626         struct fcoe_hdr *fcoe_hdr;
 627         struct fcoe_crc_eof *ft;
 628
 629         /*
 630          * Undo VLAN encapsulation if present.
 631          */
 632         eh = (struct ethhdr *)skb->data;
 633         if (eh->h_proto == htons(ETH_P_8021Q)) {
 634                 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
 635                 eh = (struct ethhdr *)skb_pull(skb, VLAN_HLEN);
 636                 skb_reset_mac_header(skb);
 637         }
 638         if (eh->h_proto == htons(ETH_P_FIP)) {
 639                 if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) {
 640                         printk(KERN_ERR "Dropped FIP frame, as firmware "
 641                                         "uses non-FIP mode, Enable FIP "
 642                                         "using UCSM\n");
 643                         goto drop;
 644                 }
 645                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
 646                         FNIC_FC_RECV|0x80, (char *)skb->data, skb->len)) != 0) {
 647                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
 648                 }
 649                 skb_queue_tail(&fnic->fip_frame_queue, skb);
 650                 queue_work(fnic_fip_queue, &fnic->fip_frame_work);
 651                 return 1;               /* let caller know packet was used */
 652         }
 653         if (eh->h_proto != htons(ETH_P_FCOE))
 654                 goto drop;
 655         skb_set_network_header(skb, sizeof(*eh));
 656         skb_pull(skb, sizeof(*eh));
 657
 658         fcoe_hdr = (struct fcoe_hdr *)skb->data;
 659         if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
 660                 goto drop;
 661
 662         fp = (struct fc_frame *)skb;
 663         fc_frame_init(fp);
 664         fr_sof(fp) = fcoe_hdr->fcoe_sof;
 665         skb_pull(skb, sizeof(struct fcoe_hdr));
 666         skb_reset_transport_header(skb);
 667
 668         ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft));
 669         fr_eof(fp) = ft->fcoe_eof;
 670         skb_trim(skb, skb->len - sizeof(*ft));
 671         return 0;
 672 drop:
 673         dev_kfree_skb_irq(skb);
 674         return -1;
 675 }
 676
 677 /**
 678  * fnic_update_mac_locked() - set data MAC address and filters.
 679  * @fnic:       fnic instance.
 680  * @new:        newly-assigned FCoE MAC address.
 681  *
 682  * Called with the fnic lock held.
 683  */
 684 void fnic_update_mac_locked(struct fnic *fnic, u8 *new)
 685 {
 686         u8 *ctl = fnic->ctlr.ctl_src_addr;
 687         u8 *data = fnic->data_src_addr;
 688
 689         if (is_zero_ether_addr(new))
 690                 new = ctl;
 691         if (ether_addr_equal(data, new))
 692                 return;
 693         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
 694         if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl))
 695                 vnic_dev_del_addr(fnic->vdev, data);
 696         memcpy(data, new, ETH_ALEN);
 697         if (!ether_addr_equal(new, ctl))
 698                 vnic_dev_add_addr(fnic->vdev, new);
 699 }
 700
 701 /**
 702  * fnic_update_mac() - set data MAC address and filters.
 703  * @lport:      local port.
 704  * @new:        newly-assigned FCoE MAC address.
 705  */
 706 void fnic_update_mac(struct fc_lport *lport, u8 *new)
 707 {
 708         struct fnic *fnic = lport_priv(lport);
 709
 710         spin_lock_irq(&fnic->fnic_lock);
 711         fnic_update_mac_locked(fnic, new);
 712         spin_unlock_irq(&fnic->fnic_lock);
 713 }
 714
 715 /**
 716  * fnic_set_port_id() - set the port_ID after successful FLOGI.
 717  * @lport:      local port.
 718  * @port_id:    assigned FC_ID.
 719  * @fp:         received frame containing the FLOGI accept or NULL.
 720  *
 721  * This is called from libfc when a new FC_ID has been assigned.
 722  * This causes us to reset the firmware to FC_MODE and setup the new MAC
 723  * address and FC_ID.
 724  *
 725  * It is also called with FC_ID 0 when we're logged off.
 726  *
 727  * If the FC_ID is due to point-to-point, fp may be NULL.
 728  */
 729 void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp)
 730 {
 731         struct fnic *fnic = lport_priv(lport);
 732         u8 *mac;
 733         int ret;
 734
 735         FNIC_FCS_DBG(KERN_DEBUG, lport->host, "set port_id %x fp %p\n",
 736                      port_id, fp);
 737
 738         /*
 739          * If we're clearing the FC_ID, change to use the ctl_src_addr.
 740          * Set ethernet mode to send FLOGI.
 741          */
 742         if (!port_id) {
 743                 fnic_update_mac(lport, fnic->ctlr.ctl_src_addr);
 744                 fnic_set_eth_mode(fnic);
 745                 return;
 746         }
 747
 748         if (fp) {
 749                 mac = fr_cb(fp)->granted_mac;
 750                 if (is_zero_ether_addr(mac)) {
 751                         /* non-FIP - FLOGI already accepted - ignore return */
 752                         fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp);
 753                 }
 754                 fnic_update_mac(lport, mac);
 755         }
 756
 757         /* Change state to reflect transition to FC mode */
 758         spin_lock_irq(&fnic->fnic_lock);
 759         if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
 760                 fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
 761         else {
 762                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 763                              "Unexpected fnic state %s while"
 764                              " processing flogi resp\n",
 765                              fnic_state_to_str(fnic->state));
 766                 spin_unlock_irq(&fnic->fnic_lock);
 767                 return;
 768         }
 769         spin_unlock_irq(&fnic->fnic_lock);
 770
 771         /*
 772          * Send FLOGI registration to firmware to set up FC mode.
 773          * The new address will be set up when registration completes.
 774          */
 775         ret = fnic_flogi_reg_handler(fnic, port_id);
 776
 777         if (ret < 0) {
 778                 spin_lock_irq(&fnic->fnic_lock);
 779                 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
 780                         fnic->state = FNIC_IN_ETH_MODE;
 781                 spin_unlock_irq(&fnic->fnic_lock);
 782         }
 783 }
 784
 785 static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
 786                                     *cq_desc, struct vnic_rq_buf *buf,
 787                                     int skipped __attribute__((unused)),
 788                                     void *opaque)
 789 {
 790         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 791         struct sk_buff *skb;
 792         struct fc_frame *fp;
 793         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
 794         unsigned int eth_hdrs_stripped;
 795         u8 type, color, eop, sop, ingress_port, vlan_stripped;
 796         u8 fcoe = 0, fcoe_sof, fcoe_eof;
 797         u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
 798         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
 799         u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
 800         u8 fcs_ok = 1, packet_error = 0;
 801         u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
 802         u32 rss_hash;
 803         u16 exchange_id, tmpl;
 804         u8 sof = 0;
 805         u8 eof = 0;
 806         u32 fcp_bytes_written = 0;
 807         unsigned long flags;
 808
 809         pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
 810                          PCI_DMA_FROMDEVICE);
 811         skb = buf->os_buf;
 812         fp = (struct fc_frame *)skb;
 813         buf->os_buf = NULL;
 814
 815         cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
 816         if (type == CQ_DESC_TYPE_RQ_FCP) {
 817                 cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
 818                                    &type, &color, &q_number, &completed_index,
 819                                    &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
 820                                    &tmpl, &fcp_bytes_written, &sof, &eof,
 821                                    &ingress_port, &packet_error,
 822                                    &fcoe_enc_error, &fcs_ok, &vlan_stripped,
 823                                    &vlan);
 824                 eth_hdrs_stripped = 1;
 825                 skb_trim(skb, fcp_bytes_written);
 826                 fr_sof(fp) = sof;
 827                 fr_eof(fp) = eof;
 828
 829         } else if (type == CQ_DESC_TYPE_RQ_ENET) {
 830                 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
 831                                     &type, &color, &q_number, &completed_index,
 832                                     &ingress_port, &fcoe, &eop, &sop,
 833                                     &rss_type, &csum_not_calc, &rss_hash,
 834                                     &bytes_written, &packet_error,
 835                                     &vlan_stripped, &vlan, &checksum,
 836                                     &fcoe_sof, &fcoe_fc_crc_ok,
 837                                     &fcoe_enc_error, &fcoe_eof,
 838                                     &tcp_udp_csum_ok, &udp, &tcp,
 839                                     &ipv4_csum_ok, &ipv6, &ipv4,
 840                                     &ipv4_fragment, &fcs_ok);
 841                 eth_hdrs_stripped = 0;
 842                 skb_trim(skb, bytes_written);
 843                 if (!fcs_ok) {
 844                         atomic64_inc(&fnic_stats->misc_stats.frame_errors);
 845                         FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 846                                      "fcs error.  dropping packet.\n");
 847                         goto drop;
 848                 }
 849                 if (fnic_import_rq_eth_pkt(fnic, skb))
 850                         return;
 851
 852         } else {
 853                 /* wrong CQ type*/
 854                 shost_printk(KERN_ERR, fnic->lport->host,
 855                              "fnic rq_cmpl wrong cq type x%x\n", type);
 856                 goto drop;
 857         }
 858
 859         if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
 860                 atomic64_inc(&fnic_stats->misc_stats.frame_errors);
 861                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 862                              "fnic rq_cmpl fcoe x%x fcsok x%x"
 863                              " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
 864                              " x%x\n",
 865                              fcoe, fcs_ok, packet_error,
 866                              fcoe_fc_crc_ok, fcoe_enc_error);
 867                 goto drop;
 868         }
 869
 870         spin_lock_irqsave(&fnic->fnic_lock, flags);
 871         if (fnic->stop_rx_link_events) {
 872                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 873                 goto drop;
 874         }
 875         fr_dev(fp) = fnic->lport;
 876         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 877         if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_RECV,
 878                                         (char *)skb->data, skb->len)) != 0) {
 879                 printk(KERN_ERR "fnic ctlr frame trace error!!!");
 880         }
 881
 882         skb_queue_tail(&fnic->frame_queue, skb);
 883         queue_work(fnic_event_queue, &fnic->frame_work);
 884
 885         return;
 886 drop:
 887         dev_kfree_skb_irq(skb);
 888 }
 889
 890 static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
 891                                      struct cq_desc *cq_desc, u8 type,
 892                                      u16 q_number, u16 completed_index,
 893                                      void *opaque)
 894 {
 895         struct fnic *fnic = vnic_dev_priv(vdev);
 896
 897         vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
 898                         VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
 899                         NULL);
 900         return 0;
 901 }
 902
 903 int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
 904 {
 905         unsigned int tot_rq_work_done = 0, cur_work_done;
 906         unsigned int i;
 907         int err;
 908
 909         for (i = 0; i < fnic->rq_count; i++) {
 910                 cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
 911                                                 fnic_rq_cmpl_handler_cont,
 912                                                 NULL);
 913                 if (cur_work_done) {
 914                         err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
 915                         if (err)
 916                                 shost_printk(KERN_ERR, fnic->lport->host,
 917                                              "fnic_alloc_rq_frame can't alloc"
 918                                              " frame\n");
 919                 }
 920                 tot_rq_work_done += cur_work_done;
 921         }
 922
 923         return tot_rq_work_done;
 924 }
 925
 926 /*
 927  * This function is called once at init time to allocate and fill RQ
 928  * buffers. Subsequently, it is called in the interrupt context after RQ
 929  * buffer processing to replenish the buffers in the RQ
 930  */
 931 int fnic_alloc_rq_frame(struct vnic_rq *rq)
 932 {
 933         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 934         struct sk_buff *skb;
 935         u16 len;
 936         dma_addr_t pa;
 937
 938         len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
 939         skb = dev_alloc_skb(len);
 940         if (!skb) {
 941                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
 942                              "Unable to allocate RQ sk_buff\n");
 943                 return -ENOMEM;
 944         }
 945         skb_reset_mac_header(skb);
 946         skb_reset_transport_header(skb);
 947         skb_reset_network_header(skb);
 948         skb_put(skb, len);
 949         pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
 950         fnic_queue_rq_desc(rq, skb, pa, len);
 951         return 0;
 952 }
 953
 954 void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
 955 {
 956         struct fc_frame *fp = buf->os_buf;
 957         struct fnic *fnic = vnic_dev_priv(rq->vdev);
 958
 959         pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
 960                          PCI_DMA_FROMDEVICE);
 961
 962         dev_kfree_skb(fp_skb(fp));
 963         buf->os_buf = NULL;
 964 }
 965
 966 /**
 967  * fnic_eth_send() - Send Ethernet frame.
 968  * @fip:        fcoe_ctlr instance.
 969  * @skb:        Ethernet Frame, FIP, without VLAN encapsulation.
 970  */
 971 void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
 972 {
 973         struct fnic *fnic = fnic_from_ctlr(fip);
 974         struct vnic_wq *wq = &fnic->wq[0];
 975         dma_addr_t pa;
 976         struct ethhdr *eth_hdr;
 977         struct vlan_ethhdr *vlan_hdr;
 978         unsigned long flags;
 979
 980         if (!fnic->vlan_hw_insert) {
 981                 eth_hdr = (struct ethhdr *)skb_mac_header(skb);
 982                 vlan_hdr = (struct vlan_ethhdr *)skb_push(skb,
 983                                 sizeof(*vlan_hdr) - sizeof(*eth_hdr));
 984                 memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
 985                 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
 986                 vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
 987                 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
 988                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
 989                         FNIC_FC_SEND|0x80, (char *)eth_hdr, skb->len)) != 0) {
 990                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
 991                 }
 992         } else {
 993                 if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
 994                         FNIC_FC_SEND|0x80, (char *)skb->data, skb->len)) != 0) {
 995                         printk(KERN_ERR "fnic ctlr frame trace error!!!");
 996                 }
 997         }
 998
 999         pa = pci_map_single(fnic->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
1000
1001         spin_lock_irqsave(&fnic->wq_lock[0], flags);
1002         if (!vnic_wq_desc_avail(wq)) {
1003                 pci_unmap_single(fnic->pdev, pa, skb->len, PCI_DMA_TODEVICE);
1004                 spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1005                 kfree_skb(skb);
1006                 return;
1007         }
1008
1009         fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
1010                                0 /* hw inserts cos value */,
1011                                fnic->vlan_id, 1);
1012         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1013 }
1014
1015 /*
1016  * Send FC frame.
1017  */
1018 static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
1019 {
1020         struct vnic_wq *wq = &fnic->wq[0];
1021         struct sk_buff *skb;
1022         dma_addr_t pa;
1023         struct ethhdr *eth_hdr;
1024         struct vlan_ethhdr *vlan_hdr;
1025         struct fcoe_hdr *fcoe_hdr;
1026         struct fc_frame_header *fh;
1027         u32 tot_len, eth_hdr_len;
1028         int ret = 0;
1029         unsigned long flags;
1030
1031         fh = fc_frame_header_get(fp);
1032         skb = fp_skb(fp);
1033
1034         if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
1035             fcoe_ctlr_els_send(&fnic->ctlr, fnic->lport, skb))
1036                 return 0;
1037
1038         if (!fnic->vlan_hw_insert) {
1039                 eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
1040                 vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len);
1041                 eth_hdr = (struct ethhdr *)vlan_hdr;
1042                 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
1043                 vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
1044                 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
1045                 fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
1046         } else {
1047                 eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
1048                 eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len);
1049                 eth_hdr->h_proto = htons(ETH_P_FCOE);
1050                 fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
1051         }
1052
1053         if (fnic->ctlr.map_dest)
1054                 fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
1055         else
1056                 memcpy(eth_hdr->h_dest, fnic->ctlr.dest_addr, ETH_ALEN);
1057         memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
1058
1059         tot_len = skb->len;
1060         BUG_ON(tot_len % 4);
1061
1062         memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
1063         fcoe_hdr->fcoe_sof = fr_sof(fp);
1064         if (FC_FCOE_VER)
1065                 FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
1066
1067         pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
1068
1069         if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_SEND,
1070                                 (char *)eth_hdr, tot_len)) != 0) {
1071                 printk(KERN_ERR "fnic ctlr frame trace error!!!");
1072         }
1073
1074         spin_lock_irqsave(&fnic->wq_lock[0], flags);
1075
1076         if (!vnic_wq_desc_avail(wq)) {
1077                 pci_unmap_single(fnic->pdev, pa,
1078                                  tot_len, PCI_DMA_TODEVICE);
1079                 ret = -1;
1080                 goto fnic_send_frame_end;
1081         }
1082
1083         fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
1084                            0 /* hw inserts cos value */,
1085                            fnic->vlan_id, 1, 1, 1);
1086 fnic_send_frame_end:
1087         spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
1088
1089         if (ret)
1090                 dev_kfree_skb_any(fp_skb(fp));
1091
1092         return ret;
1093 }
1094
1095 /*
1096  * fnic_send
1097  * Routine to send a raw frame
1098  */
1099 int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
1100 {
1101         struct fnic *fnic = lport_priv(lp);
1102         unsigned long flags;
1103
1104         if (fnic->in_remove) {
1105                 dev_kfree_skb(fp_skb(fp));
1106                 return -1;
1107         }
1108
1109         /*
1110          * Queue frame if in a transitional state.
1111          * This occurs while registering the Port_ID / MAC address after FLOGI.
1112          */
1113         spin_lock_irqsave(&fnic->fnic_lock, flags);
1114         if (fnic->state != FNIC_IN_FC_MODE && fnic->state != FNIC_IN_ETH_MODE) {
1115                 skb_queue_tail(&fnic->tx_queue, fp_skb(fp));
1116                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1117                 return 0;
1118         }
1119         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1120
1121         return fnic_send_frame(fnic, fp);
1122 }
1123
1124 /**
1125  * fnic_flush_tx() - send queued frames.
1126  * @fnic: fnic device
1127  *
1128  * Send frames that were waiting to go out in FC or Ethernet mode.
1129  * Whenever changing modes we purge queued frames, so these frames should
1130  * be queued for the stable mode that we're in, either FC or Ethernet.
1131  *
1132  * Called without fnic_lock held.
1133  */
1134 void fnic_flush_tx(struct fnic *fnic)
1135 {
1136         struct sk_buff *skb;
1137         struct fc_frame *fp;
1138
1139         while ((skb = skb_dequeue(&fnic->tx_queue))) {
1140                 fp = (struct fc_frame *)skb;
1141                 fnic_send_frame(fnic, fp);
1142         }
1143 }
1144
1145 /**
1146  * fnic_set_eth_mode() - put fnic into ethernet mode.
1147  * @fnic: fnic device
1148  *
1149  * Called without fnic lock held.
1150  */
1151 static void fnic_set_eth_mode(struct fnic *fnic)
1152 {
1153         unsigned long flags;
1154         enum fnic_state old_state;
1155         int ret;
1156
1157         spin_lock_irqsave(&fnic->fnic_lock, flags);
1158 again:
1159         old_state = fnic->state;
1160         switch (old_state) {
1161         case FNIC_IN_FC_MODE:
1162         case FNIC_IN_ETH_TRANS_FC_MODE:
1163         default:
1164                 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1165                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1166
1167                 ret = fnic_fw_reset_handler(fnic);
1168
1169                 spin_lock_irqsave(&fnic->fnic_lock, flags);
1170                 if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
1171                         goto again;
1172                 if (ret)
1173                         fnic->state = old_state;
1174                 break;
1175
1176         case FNIC_IN_FC_TRANS_ETH_MODE:
1177         case FNIC_IN_ETH_MODE:
1178                 break;
1179         }
1180         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1181 }
1182
1183 static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
1184                                         struct cq_desc *cq_desc,
1185                                         struct vnic_wq_buf *buf, void *opaque)
1186 {
1187         struct sk_buff *skb = buf->os_buf;
1188         struct fc_frame *fp = (struct fc_frame *)skb;
1189         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1190
1191         pci_unmap_single(fnic->pdev, buf->dma_addr,
1192                          buf->len, PCI_DMA_TODEVICE);
1193         dev_kfree_skb_irq(fp_skb(fp));
1194         buf->os_buf = NULL;
1195 }
1196
1197 static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
1198                                      struct cq_desc *cq_desc, u8 type,
1199                                      u16 q_number, u16 completed_index,
1200                                      void *opaque)
1201 {
1202         struct fnic *fnic = vnic_dev_priv(vdev);
1203         unsigned long flags;
1204
1205         spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
1206         vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
1207                         fnic_wq_complete_frame_send, NULL);
1208         spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
1209
1210         return 0;
1211 }
1212
1213 int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
1214 {
1215         unsigned int wq_work_done = 0;
1216         unsigned int i;
1217
1218         for (i = 0; i < fnic->raw_wq_count; i++) {
1219                 wq_work_done  += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
1220                                                  work_to_do,
1221                                                  fnic_wq_cmpl_handler_cont,
1222                                                  NULL);
1223         }
1224
1225         return wq_work_done;
1226 }
1227
1228
1229 void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
1230 {
1231         struct fc_frame *fp = buf->os_buf;
1232         struct fnic *fnic = vnic_dev_priv(wq->vdev);
1233
1234         pci_unmap_single(fnic->pdev, buf->dma_addr,
1235                          buf->len, PCI_DMA_TODEVICE);
1236
1237         dev_kfree_skb(fp_skb(fp));
1238         buf->os_buf = NULL;
1239 }
1240
1241 void fnic_fcoe_reset_vlans(struct fnic *fnic)
1242 {
1243         unsigned long flags;
1244         struct fcoe_vlan *vlan;
1245         struct fcoe_vlan *next;
1246
1247         /*
1248          * indicate a link down to fcoe so that all fcf's are free'd
1249          * might not be required since we did this before sending vlan
1250          * discovery request
1251          */
1252         spin_lock_irqsave(&fnic->vlans_lock, flags);
1253         if (!list_empty(&fnic->vlans)) {
1254                 list_for_each_entry_safe(vlan, next, &fnic->vlans, list) {
1255                         list_del(&vlan->list);
1256                         kfree(vlan);
1257                 }
1258         }
1259         spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1260 }
1261
1262 void fnic_handle_fip_timer(struct fnic *fnic)
1263 {
1264         unsigned long flags;
1265         struct fcoe_vlan *vlan;
1266         struct fnic_stats *fnic_stats = &fnic->fnic_stats;
1267         u64 sol_time;
1268
1269         spin_lock_irqsave(&fnic->fnic_lock, flags);
1270         if (fnic->stop_rx_link_events) {
1271                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1272                 return;
1273         }
1274         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1275
1276         if (fnic->ctlr.mode == FIP_ST_NON_FIP)
1277                 return;
1278
1279         spin_lock_irqsave(&fnic->vlans_lock, flags);
1280         if (list_empty(&fnic->vlans)) {
1281                 /* no vlans available, try again */
1282                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1283                           "Start VLAN Discovery\n");
1284                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1285                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1286                 return;
1287         }
1288
1289         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
1290         shost_printk(KERN_DEBUG, fnic->lport->host,
1291                   "fip_timer: vlan %d state %d sol_count %d\n",
1292                   vlan->vid, vlan->state, vlan->sol_count);
1293         switch (vlan->state) {
1294         case FIP_VLAN_USED:
1295                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1296                           "FIP VLAN is selected for FC transaction\n");
1297                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1298                 break;
1299         case FIP_VLAN_FAILED:
1300                 /* if all vlans are in failed state, restart vlan disc */
1301                 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
1302                           "Start VLAN Discovery\n");
1303                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1304                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1305                 break;
1306         case FIP_VLAN_SENT:
1307                 if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
1308                         /*
1309                          * no response on this vlan, remove  from the list.
1310                          * Try the next vlan
1311                          */
1312                         shost_printk(KERN_INFO, fnic->lport->host,
1313                                   "Dequeue this VLAN ID %d from list\n",
1314                                   vlan->vid);
1315                         list_del(&vlan->list);
1316                         kfree(vlan);
1317                         vlan = NULL;
1318                         if (list_empty(&fnic->vlans)) {
1319                                 /* we exhausted all vlans, restart vlan disc */
1320                                 spin_unlock_irqrestore(&fnic->vlans_lock,
1321                                                         flags);
1322                                 shost_printk(KERN_INFO, fnic->lport->host,
1323                                           "fip_timer: vlan list empty, "
1324                                           "trigger vlan disc\n");
1325                                 fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
1326                                 return;
1327                         }
1328                         /* check the next vlan */
1329                         vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan,
1330                                                         list);
1331                         fnic->set_vlan(fnic, vlan->vid);
1332                         vlan->state = FIP_VLAN_SENT; /* sent now */
1333                 }
1334                 spin_unlock_irqrestore(&fnic->vlans_lock, flags);
1335                 atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count);
1336                 vlan->sol_count++;
1337                 sol_time = jiffies + msecs_to_jiffies
1338                                         (FCOE_CTLR_START_DELAY);
1339                 mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
1340                 break;
1341         }
1342 }